Update base64

Cargo.toml

@@ -19,7 +19,7 @@ members = [
 [dependencies]
 http = "0.2.0"
 headers-core = { version = "0.2", path = "./headers-core" }
-base64 = "0.13"
+base64 = "0.20"
 bitflags = "1.0"
 bytes = "1"
 mime = "0.3.14"

src/common/authorization.rs

@@ -1,6 +1,10 @@
 //! Authorization header and types.
 
-use base64;
+use base64::{
+    self,
+    engine::fast_portable::{FastPortable, FastPortableConfig},
+    alphabet::STANDARD,
+};
 use bytes::Bytes;
 
 use util::HeaderValueString;
@@ -168,8 +172,10 @@ impl Credentials for Basic {
     }
 
     fn encode(&self) -> HeaderValue {
+        const ENGINE: FastPortable = FastPortable::from(&STANDARD, FastPortableConfig::new());
+
         let mut encoded = String::from("Basic ");
-        base64::encode_config_buf(&self.decoded, base64::STANDARD, &mut encoded);
+        base64::encode_engine_string(&self.decoded, &mut encoded, &ENGINE);
 
         let bytes = Bytes::from(encoded);
         HeaderValue::from_maybe_shared(bytes)